Quote:
Originally Posted by DIAPERMAN
1/2 inch line comes out of the side top of the black tank and runs up in wall the line that goes out of valve I dont know where it goes smell comes up front when driving ,but it is in bath area also any ideas
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Make sure both black and gray water tank vents are open, you can run water down both vents with a garden hose from the roof. Check under the kitchen sink there should be a syphon style vent that comes off the top of the drainline. In my coach it is stuck way back in the corner and hard to see. These vents have a spring and flapper in them and they can stick in the open position. Not sure what the 1/2" line would go to, and the valve in that line is most likely a check valve to keep odors from coming out when line is empty. This line is most likely an overflow from something not in use all the time.